66682586881 has 2 divisors, whose sum is σ = 66682586882. Its totient is φ = 66682586880.

The previous prime is 66682586843. The next prime is 66682586891. The reversal of 66682586881 is 18868528666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33494856256 + 33187730625 = 183016^2 + 182175^2 .

It is a cyclic number.

It is not a de Polignac number, because 66682586881 - 2¹³ = 66682578689 is a prime.

It is a super-2 number, since 2×66682586881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66682586891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33341293440 + 33341293441.

It is an arithmetic number, because the mean of its divisors is an integer number (33341293441).

Almost surely, 2^66682586881 is an apocalyptic number.

It is an amenable number.

66682586881 is a deficient number, since it is larger than the sum of its proper divisors (1).

66682586881 is an equidigital number, since it uses as much as digits as its factorization.

66682586881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53084160, while the sum is 64.

The spelling of 66682586881 in words is "sixty-six billion, six hundred eighty-two million, five hundred eighty-six thousand, eight hundred eighty-one".